Monomachine all the way! 
MD UW - it was the gateway drug to the rest of them, for me.
Then A4,AR,MnM,OT
MD all the way
IMO Elektron lost the plot with the interface design in the black boxes - even though they may be “better” on paper they didn’t figure out how to elegantly translate new features and complexity into the workflow.
OT for me is like a swiss knife, because it’s so versatile. If I had to choose it would be my desert island machine, too. Rytm on the other hand gives me instant gratification. Load a few samples and bang out patterns in no time (BTW Volca Sample is pretty similar in that respect). Haven’t really fallen in love with the A4 yet, probably due to my lack of sound design skills. To cut a long story short:
- OT 2) AR 3) A4
Cheers,
Hans
MD UW by a long way. I love this thing; the way it looks, the way it feels, it’s elegance and simplicity. Then closely followed by my OT, which I actually use more than the MD but it’s complexity makes it a little less fun for me.
I also have a MnM, but I really don’t get it yet. I’m just no good at it. I make better sounds faster with my vsts/ipad. I know you can do so much with it but I’m not clicking with it. I will probably sell it. So that’s MD > OT > MnM for me.
I don’t have any of the Analogs so can’t comment there.
I own the OT, A4, and MD (non-UW Mk II version.)
The Octatrack for me is the go-to device, as I feed so many various sources into it: at home it might be a modular synth, vinyl from my turntable, the other elektron instruments, or something I cobbled together in Live.
In live performance situations (the majority of its use) I feed it a Prophet '08, the A4, and sometimes my basses. I love it the most when I’m using it to improvise as our trio plays.
The OT takes on such a different character whatever you feed it–one of its main compelling charms for me.
MD is absolutely (as stated before) the most immediate.
A4 just sounds gorgeous, and is a perfect partner to my Prophet.
With that: OT > A4 > MD
A4 for me wins hands down. I’ve got OT, AR, MD and A4…
Each machine has it’s place but A4s sound (took a while to learn the sweet spots) is just huge. Even for drums I think I prefer it to the AR synth drum sounds. The performance mode just makes songs come alive and breathes fresh air into my productions.
Every time I use it I find a new way of working on it…it’s pretty un-user friendly and a bit of a puzzle to get sounds that are quite easy to get on wysiwyg synths, but that’s part of its character. I would fucking LOVE an arpeggiator update though! 
Octatrack for me, mostly due to being able to utilize effects loops via the cue outs and inputs for endless mangling and resampling. I dont think i’d care much for any of my synths without it since I process the hell out of them with it (I just don’t get the same joy doing this with a computer). I’ve always been most creative with samplers and the OT is king for me. I don’t know where my music would be without it.
Second is the Monomachine. I get the most intriguing synth sounds with it… sometimes. Other times I wonder why I love it so much, but that always goes away with the next sound I stumble upon. The key to the MNM for me is using external effects. Sounds wonderful once I start mangling it in the OT.
For me it’s also Depend about what kind of music…
To me OT and AR are the perfect combo
But all machines was very nice no doubt about that.
OT for features and workflow, although quite useless to me without being fed by my MD and A4 
I love all my children equally 
well, not really…
A4–>RYTM–>MD–>MnM–>OT
I prefer different machines in different scenarios so it’s a difficult call for me.
MD is so musical & the most ‘instrument’ like. I love it’s architecture, it’s built for live jamming. It’s the only one of the 5 boxes that I feel I could take out live with no prep’d material whatsoever & still get a gig out of it.
MM is much misunderstood at first glance but is a treasure trove. The more time I spend with it the more I love it.
OT with very little prep can be like the MD in terms of musical flow. It also reminds me of the MM b’cos it can be a bit of a chameleon & change it personality depending on machine assignments/routing etc.
A4 & AR usher in better sequencers, better FX (generally but I still love the MM delays), & a lot more performance based features. That said they require more prep to get the most out of them IMO…
There’s a lack of immediacy for me that the MD had nailed & even the OT came close to.
An example would be ‘Scenes’. On the OT I’d never stop playback, you just dial in on the fly & away you go. I find this a bit fiddly on the newer boxes, the flow is lost for me.
Live…MD > OT > MM > AR > A4
Studio…MM > A4 > OT > MD > AR
I acquired them in that order :
A4 (Q3 '13 : first synth ever) -> OT (Q3 '13) -> MD (Q1 '14) -> AR (Q4 '14).
And prefer them in that order :
AR+A4 -> OT -> MD.
But that may be because I just got my AR and love it’s immediacy and the organic feeling of scenes and perf modes.
AR and A4 are an amazing combo !
I rarely use the AR without the A4 (mostly for melodies, basslines and pads/FX.)
Although the OT is only third for the moment, I use it all the time, if only as a mixer, MIDI sequencer, FX processor (including cueing to external FX) and a loop sampler (from other synths like Monotribe and Shruthi-1.)
It’s an amazing box but I’m still new to music production and am more comfortable with boxes which generate their own sounds than with samplers of that depth. Need still more practice with it…
I’m having loads of fun with the AR samples, though.
MD got a lot of love until AR arrived… love that analog punchy sound more than the more glitchy digital nature of the MDUW+ for the moment. That will probably change once I got enough practice with AR, then I’ll try to combine them both.
Desert Island box ? Don’t make me choose, please !
For now it’d probably be the AR, but once the OT will be mastered…
MO-NO-MA-CHI-NE
greatest synth ever built imho 
hey biologic … I really enjoy your sounds … would you do me a solid ? could you when you have a “spare minute” make a sound design tutorial for the MM (non+drive) … especially pads ???
here my toys chart:
rank 1 : MD
rank 2 : A4
Rank 3 : OT MM AR
Thanks 
I’ve thought about this, but the beauty in the MnM isn’t really the sounds, it’s the integration with the seq too. That’s probably why the MnM is so loved and hated by people I may do it in the future, but right now I’m diving into the RYTM…
too great a puzzle for this ‘classic’ trinity owner. each one feels like a tool that i reach for under different circumstances, which have significant overlap … inspiration increases with experience.
i’m having a hard time even choosing my favorite configuration of two or more elektrons.
together with my iPad, i haven’t felt GAS in more than two years.
Only had my MDUW for a few hours and it’s shot to the top of my A4 and Octatrack, so easy to use! OK back to jamming…
monomachine.
dual, better.
Couldn’t live without all three: AR, A4 and OT.
If one had to go, the A4 would go first followed begrudgingly by the AR.
The OT would need to be pried from my cold dead hands.
OT